Aircraft



FIG. 1 is a perspective view of an aircraft showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof; and

FIG. 5 is a left side elevation view thereof.

The parts shown in broken lines are for illustrative purposes only and form no part of the design. 

The ornamental design of an aircraft, as shown and described. 